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                    模块化Module
            
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                    异常处理
            
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                    js 扩展
            
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                    选择器
            
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                    层级选择器
            
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                    事件
            
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                    AJAX
            
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                    扩展
            
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                    Nodejs
            
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                    模块
            
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                    path
            
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                    文件操作 fs
            
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                    zlib压缩解压缩
            
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                    net网络
            
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                    http
            
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                    express框架
            
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                    process 进程
            
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                    os-操作系统
            
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                    React
            
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                                <h1 id="&#x67E5;&#x627E;&#x548C;&#x8FC7;&#x6EE4;">&#x67E5;&#x627E;&#x548C;&#x8FC7;&#x6EE4;</h1>
<p>&#x901A;&#x5E38;&#x60C5;&#x51B5;&#x4E0B;&#x9009;&#x62E9;&#x5668;&#x53EF;&#x4EE5;&#x76F4;&#x63A5;&#x5B9A;&#x4F4D;&#x5230;&#x6211;&#x4EEC;&#x60F3;&#x8981;&#x7684;&#x5143;&#x7D20;&#xFF0C;&#x4F46;&#x662F;&#xFF0C;&#x5F53;&#x6211;&#x4EEC;&#x62FF;&#x5230;&#x4E00;&#x4E2A;jQuery&#x5BF9;&#x8C61;&#x540E;&#xFF0C;&#x8FD8;&#x53EF;&#x4EE5;&#x4EE5;&#x8FD9;&#x4E2A;&#x5BF9;&#x8C61;&#x4E3A;&#x57FA;&#x51C6;&#xFF0C;&#x8FDB;&#x884C;&#x67E5;&#x627E;&#x548C;&#x8FC7;&#x6EE4;&#x3002;</p>
<p>&#x6700;&#x5E38;&#x89C1;&#x7684;&#x67E5;&#x627E;&#x662F;&#x5728;&#x67D0;&#x4E2A;&#x8282;&#x70B9;&#x7684;&#x6240;&#x6709;&#x5B50;&#x8282;&#x70B9;&#x4E2D;&#x67E5;&#x627E;&#xFF0C;&#x4F7F;&#x7528;<code>find()</code>&#x65B9;&#x6CD5;&#xFF0C;&#x5B83;&#x672C;&#x8EAB;&#x53C8;&#x63A5;&#x6536;&#x4E00;&#x4E2A;&#x4EFB;&#x610F;&#x7684;&#x9009;&#x62E9;&#x5668;&#x3002;&#x4F8B;&#x5982;&#x5982;&#x4E0B;&#x7684;HTML&#x7ED3;&#x6784;&#xFF1A;</p>
<pre><code class="lang-html"><span class="hljs-comment">&lt;!-- HTML&#x7ED3;&#x6784; --&gt;</span>
<span class="hljs-tag">&lt;<span class="hljs-name">ul</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;lang&quot;</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">li</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;js dy&quot;</span>&gt;</span>JavaScript<span class="hljs-tag">&lt;/<span class="hljs-name">li</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">li</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;dy&quot;</span>&gt;</span>Python<span class="hljs-tag">&lt;/<span class="hljs-name">li</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">li</span> <span class="hljs-attr">id</span>=<span class="hljs-string">&quot;swift&quot;</span>&gt;</span>Swift<span class="hljs-tag">&lt;/<span class="hljs-name">li</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">li</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;dy&quot;</span>&gt;</span>Scheme<span class="hljs-tag">&lt;/<span class="hljs-name">li</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">li</span> <span class="hljs-attr">name</span>=<span class="hljs-string">&quot;haskell&quot;</span>&gt;</span>Haskell<span class="hljs-tag">&lt;/<span class="hljs-name">li</span>&gt;</span>
<span class="hljs-tag">&lt;/<span class="hljs-name">ul</span>&gt;</span>
</code></pre>
<p>&#x7528;<code>find()</code>&#x67E5;&#x627E;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> ul = $(<span class="hljs-string">&apos;ul.lang&apos;</span>); <span class="hljs-comment">// &#x83B7;&#x5F97;&lt;ul&gt;</span>
<span class="hljs-keyword">var</span> dy = ul.find(<span class="hljs-string">&apos;.dy&apos;</span>); <span class="hljs-comment">// &#x83B7;&#x5F97;JavaScript, Python, Scheme</span>
<span class="hljs-keyword">var</span> swf = ul.find(<span class="hljs-string">&apos;#swift&apos;</span>); <span class="hljs-comment">// &#x83B7;&#x5F97;Swift</span>
<span class="hljs-keyword">var</span> hsk = ul.find(<span class="hljs-string">&apos;[name=haskell]&apos;</span>); <span class="hljs-comment">// &#x83B7;&#x5F97;Haskell</span>
</code></pre>
<p>&#x5982;&#x679C;&#x8981;&#x4ECE;&#x5F53;&#x524D;&#x8282;&#x70B9;&#x5F00;&#x59CB;&#x5411;&#x4E0A;&#x67E5;&#x627E;&#xFF0C;&#x4F7F;&#x7528;<code>parent()</code>&#x65B9;&#x6CD5;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> swf = $(<span class="hljs-string">&apos;#swift&apos;</span>); <span class="hljs-comment">// &#x83B7;&#x5F97;Swift</span>
<span class="hljs-keyword">var</span> parent = swf.parent(); <span class="hljs-comment">// &#x83B7;&#x5F97;Swift&#x7684;&#x4E0A;&#x5C42;&#x8282;&#x70B9;&lt;ul&gt;</span>
<span class="hljs-keyword">var</span> a = swf.parent(<span class="hljs-string">&apos;.red&apos;</span>); <span class="hljs-comment">// &#x83B7;&#x5F97;Swift&#x7684;&#x4E0A;&#x5C42;&#x8282;&#x70B9;&lt;ul&gt;&#xFF0C;&#x540C;&#x65F6;&#x4F20;&#x5165;&#x8FC7;&#x6EE4;&#x6761;&#x4EF6;&#x3002;&#x5982;&#x679C;ul&#x4E0D;&#x7B26;&#x5408;&#x6761;&#x4EF6;&#xFF0C;&#x8FD4;&#x56DE;&#x7A7A;jQuery&#x5BF9;&#x8C61;</span>
</code></pre>
<p>&#x5BF9;&#x4E8E;&#x4F4D;&#x4E8E;&#x540C;&#x4E00;&#x5C42;&#x7EA7;&#x7684;&#x8282;&#x70B9;&#xFF0C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;<code>next()</code>&#x548C;<code>prev()</code>&#x65B9;&#x6CD5;&#xFF0C;&#x4F8B;&#x5982;&#xFF1A;</p>
<p>&#x5F53;&#x6211;&#x4EEC;&#x5DF2;&#x7ECF;&#x62FF;&#x5230;<code>Swift</code>&#x8282;&#x70B9;&#x540E;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> swift = $(<span class="hljs-string">&apos;#swift&apos;</span>);

swift.next(); <span class="hljs-comment">// Scheme</span>
swift.next(<span class="hljs-string">&apos;[name=haskell]&apos;</span>); <span class="hljs-comment">// &#x7A7A;&#x7684;jQuery&#x5BF9;&#x8C61;&#xFF0C;&#x56E0;&#x4E3A;Swift&#x7684;&#x4E0B;&#x4E00;&#x4E2A;&#x5143;&#x7D20;Scheme&#x4E0D;&#x7B26;&#x5408;&#x6761;&#x4EF6;[name=haskell]</span>

swift.prev(); <span class="hljs-comment">// Python</span>
swift.prev(<span class="hljs-string">&apos;.dy&apos;</span>); <span class="hljs-comment">// Python&#xFF0C;&#x56E0;&#x4E3A;Python&#x540C;&#x65F6;&#x7B26;&#x5408;&#x8FC7;&#x6EE4;&#x5668;&#x6761;&#x4EF6;.dy</span>
</code></pre>
<h3 id="&#x8FC7;&#x6EE4;&#x5668;&#xFF08;filter&#xFF09;">&#x8FC7;&#x6EE4;&#x5668;&#xFF08;Filter&#xFF09;</h3>
<p>&#x8FC7;&#x6EE4;&#x5668;&#x4E00;&#x822C;&#x4E0D;&#x5355;&#x72EC;&#x4F7F;&#x7528;&#xFF0C;&#x5B83;&#x901A;&#x5E38;&#x9644;&#x52A0;&#x5728;&#x9009;&#x62E9;&#x5668;&#x4E0A;&#xFF0C;&#x5E2E;&#x52A9;&#x6211;&#x4EEC;&#x66F4;&#x7CBE;&#x786E;&#x5730;&#x5B9A;&#x4F4D;&#x5143;&#x7D20;&#x3002;&#x89C2;&#x5BDF;&#x8FC7;&#x6EE4;&#x5668;&#x7684;&#x6548;&#x679C;&#xFF1A;</p>
<pre><code class="lang-html"><span class="hljs-comment">&lt;!-- HTML&#x7ED3;&#x6784; --&gt;</span>
<span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;testing&quot;</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">ul</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;lang&quot;</span>&gt;</span>
        <span class="hljs-tag">&lt;<span class="hljs-name">li</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;lang-javascript&quot;</span>&gt;</span>JavaScript<span class="hljs-tag">&lt;/<span class="hljs-name">li</span>&gt;</span>
        <span class="hljs-tag">&lt;<span class="hljs-name">li</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;lang-python&quot;</span>&gt;</span>Python<span class="hljs-tag">&lt;/<span class="hljs-name">li</span>&gt;</span>
        <span class="hljs-tag">&lt;<span class="hljs-name">li</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;lang-lua&quot;</span>&gt;</span>Lua<span class="hljs-tag">&lt;/<span class="hljs-name">li</span>&gt;</span>
    <span class="hljs-tag">&lt;/<span class="hljs-name">ul</span>&gt;</span>
<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span>
</code></pre>
<pre><code class="lang-javascript">$(<span class="hljs-string">&apos;ul.lang li:first-child&apos;</span>); <span class="hljs-comment">// &#x4EC5;&#x9009;&#x51FA;JavaScript</span>
$(<span class="hljs-string">&apos;ul.lang li:last-child&apos;</span>); <span class="hljs-comment">// &#x4EC5;&#x9009;&#x51FA;Lua</span>
$(<span class="hljs-string">&apos;ul.lang li:nth-child(2)&apos;</span>); <span class="hljs-comment">// &#x9009;&#x51FA;&#x7B2C;N&#x4E2A;&#x5143;&#x7D20;&#xFF0C;N&#x4ECE;1&#x5F00;&#x59CB;</span>
$(<span class="hljs-string">&apos;ul.lang li:nth-child(even)&apos;</span>); <span class="hljs-comment">// &#x9009;&#x51FA;&#x5E8F;&#x53F7;&#x4E3A;&#x5076;&#x6570;&#x7684;&#x5143;&#x7D20;</span>
$(<span class="hljs-string">&apos;ul.lang li:nth-child(odd)&apos;</span>); <span class="hljs-comment">// &#x9009;&#x51FA;&#x5E8F;&#x53F7;&#x4E3A;&#x5947;&#x6570;&#x7684;&#x5143;&#x7D20;</span>
</code></pre>
<h3 id="&#x8FC7;&#x6EE4;">&#x8FC7;&#x6EE4;</h3>
<p>&#x548C;&#x51FD;&#x6570;&#x5F0F;&#x7F16;&#x7A0B;&#x7684;map&#x3001;filter&#x7C7B;&#x4F3C;&#xFF0C;jQuery&#x5BF9;&#x8C61;&#x4E5F;&#x6709;&#x7C7B;&#x4F3C;&#x7684;&#x65B9;&#x6CD5;&#x3002;</p>
<p><code>filter()</code>&#x65B9;&#x6CD5;&#x53EF;&#x4EE5;&#x8FC7;&#x6EE4;&#x6389;&#x4E0D;&#x7B26;&#x5408;&#x9009;&#x62E9;&#x5668;&#x6761;&#x4EF6;&#x7684;&#x8282;&#x70B9;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> langs = $(<span class="hljs-string">&apos;ul.lang li&apos;</span>); <span class="hljs-comment">// &#x62FF;&#x5230;JavaScript, Python, Swift, Scheme&#x548C;Haskell</span>
<span class="hljs-keyword">var</span> a = langs.filter(<span class="hljs-string">&apos;.dy&apos;</span>); <span class="hljs-comment">// &#x62FF;&#x5230;JavaScript, Python, Scheme</span>
</code></pre>
<p>&#x6216;&#x8005;&#x4F20;&#x5165;&#x4E00;&#x4E2A;&#x51FD;&#x6570;&#xFF0C;&#x8981;&#x7279;&#x522B;&#x6CE8;&#x610F;&#x51FD;&#x6570;&#x5185;&#x90E8;&#x7684;<code>this</code>&#x88AB;&#x7ED1;&#x5B9A;&#x4E3A;DOM&#x5BF9;&#x8C61;&#xFF0C;&#x4E0D;&#x662F;jQuery&#x5BF9;&#x8C61;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> langs = $(<span class="hljs-string">&apos;ul.lang li&apos;</span>); <span class="hljs-comment">// &#x62FF;&#x5230;JavaScript, Python, Swift, Scheme&#x548C;Haskell</span>
langs.filter(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
    <span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>.innerHTML.indexOf(<span class="hljs-string">&apos;S&apos;</span>) === <span class="hljs-number">0</span>; <span class="hljs-comment">// &#x8FD4;&#x56DE;S&#x5F00;&#x5934;&#x7684;&#x8282;&#x70B9;</span>
}); <span class="hljs-comment">// &#x62FF;&#x5230;Swift, Scheme</span>
</code></pre>
<p><code>map()</code>&#x65B9;&#x6CD5;&#x628A;&#x4E00;&#x4E2A;jQuery&#x5BF9;&#x8C61;&#x5305;&#x542B;&#x7684;&#x82E5;&#x5E72;DOM&#x8282;&#x70B9;&#x8F6C;&#x5316;&#x4E3A;&#x5176;&#x4ED6;&#x5BF9;&#x8C61;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> langs = $(<span class="hljs-string">&apos;ul.lang li&apos;</span>); <span class="hljs-comment">// &#x62FF;&#x5230;JavaScript, Python, Swift, Scheme&#x548C;Haskell</span>
<span class="hljs-keyword">var</span> arr = langs.map(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
    <span class="hljs-keyword">return</span> <span class="hljs-keyword">this</span>.innerHTML;
}).get(); <span class="hljs-comment">// &#x7528;get()&#x62FF;&#x5230;&#x5305;&#x542B;string&#x7684;Array&#xFF1A;[&apos;JavaScript&apos;, &apos;Python&apos;, &apos;Swift&apos;, &apos;Scheme&apos;, &apos;Haskell&apos;]</span>
</code></pre>
<p>&#x6B64;&#x5916;&#xFF0C;&#x4E00;&#x4E2A;jQuery&#x5BF9;&#x8C61;&#x5982;&#x679C;&#x5305;&#x542B;&#x4E86;&#x4E0D;&#x6B62;&#x4E00;&#x4E2A;DOM&#x8282;&#x70B9;&#xFF0C;<code>first()</code>&#x3001;<code>last()</code>&#x548C;<code>slice()</code>&#x65B9;&#x6CD5;&#x53EF;&#x4EE5;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x65B0;&#x7684;jQuery&#x5BF9;&#x8C61;&#xFF0C;&#x628A;&#x4E0D;&#x9700;&#x8981;&#x7684;DOM&#x8282;&#x70B9;&#x53BB;&#x6389;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> langs = $(<span class="hljs-string">&apos;ul.lang li&apos;</span>); <span class="hljs-comment">// &#x62FF;&#x5230;JavaScript, Python, Swift, Scheme&#x548C;Haskell</span>
<span class="hljs-keyword">var</span> js = langs.first(); <span class="hljs-comment">// JavaScript&#xFF0C;&#x76F8;&#x5F53;&#x4E8E;$(&apos;ul.lang li:first-child&apos;)</span>
<span class="hljs-keyword">var</span> haskell = langs.last(); <span class="hljs-comment">// Haskell, &#x76F8;&#x5F53;&#x4E8E;$(&apos;ul.lang li:last-child&apos;)</span>
<span class="hljs-keyword">var</span> sub = langs.slice(<span class="hljs-number">2</span>, <span class="hljs-number">4</span>); <span class="hljs-comment">// Swift, Scheme, &#x53C2;&#x6570;&#x548C;&#x6570;&#x7EC4;&#x7684;slice()&#x65B9;&#x6CD5;&#x4E00;&#x81F4;</span>
</code></pre>
<h3 id="&#x8868;&#x5355;&#x76F8;&#x5173;">&#x8868;&#x5355;&#x76F8;&#x5173;</h3>
<p>&#x9488;&#x5BF9;&#x8868;&#x5355;&#x5143;&#x7D20;&#xFF0C;jQuery&#x8FD8;&#x6709;&#x4E00;&#x7EC4;&#x7279;&#x6B8A;&#x7684;&#x9009;&#x62E9;&#x5668;&#xFF1A;</p>
<ul>
<li><code>:input</code>&#xFF1A;&#x53EF;&#x4EE5;&#x9009;&#x62E9;<code>&lt;input&gt;</code>&#xFF0C;<code>&lt;textarea&gt;</code>&#xFF0C;<code>&lt;select&gt;</code>&#x548C;<code>&lt;button&gt;</code>&#xFF1B;</li>
<li><code>:file</code>&#xFF1A;&#x53EF;&#x4EE5;&#x9009;&#x62E9;<code>&lt;input type=&quot;file&quot;&gt;</code>&#xFF0C;&#x548C;<code>input[type=file]</code>&#x4E00;&#x6837;&#xFF1B;</li>
<li><code>:checkbox</code>&#xFF1A;&#x53EF;&#x4EE5;&#x9009;&#x62E9;&#x590D;&#x9009;&#x6846;&#xFF0C;&#x548C;<code>input[type=checkbox]</code>&#x4E00;&#x6837;&#xFF1B;</li>
<li><code>:radio</code>&#xFF1A;&#x53EF;&#x4EE5;&#x9009;&#x62E9;&#x5355;&#x9009;&#x6846;&#xFF0C;&#x548C;<code>input[type=radio]</code>&#x4E00;&#x6837;&#xFF1B;</li>
<li><code>:focus</code>&#xFF1A;&#x53EF;&#x4EE5;&#x9009;&#x62E9;&#x5F53;&#x524D;&#x8F93;&#x5165;&#x7126;&#x70B9;&#x7684;&#x5143;&#x7D20;&#xFF0C;&#x4F8B;&#x5982;&#x628A;&#x5149;&#x6807;&#x653E;&#x5230;&#x4E00;&#x4E2A;<code>&lt;input&gt;</code>&#x4E0A;&#xFF0C;&#x7528;<code>$(&apos;input:focus&apos;)</code>&#x5C31;&#x53EF;&#x4EE5;&#x9009;&#x51FA;&#xFF1B;</li>
<li><code>:checked</code>&#xFF1A;&#x9009;&#x62E9;&#x5F53;&#x524D;&#x52FE;&#x4E0A;&#x7684;&#x5355;&#x9009;&#x6846;&#x548C;&#x590D;&#x9009;&#x6846;&#xFF0C;&#x7528;&#x8FD9;&#x4E2A;&#x9009;&#x62E9;&#x5668;&#x53EF;&#x4EE5;&#x7ACB;&#x523B;&#x83B7;&#x5F97;&#x7528;&#x6237;&#x9009;&#x62E9;&#x7684;&#x9879;&#x76EE;&#xFF0C;&#x5982;<code>$(&apos;input[type=radio]:checked&apos;)</code>&#xFF1B;</li>
<li><code>:enabled</code>&#xFF1A;&#x53EF;&#x4EE5;&#x9009;&#x62E9;&#x53EF;&#x4EE5;&#x6B63;&#x5E38;&#x8F93;&#x5165;&#x7684;<code>&lt;input&gt;</code>&#x3001;<code>&lt;select&gt;</code> &#x7B49;&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#x6CA1;&#x6709;&#x7070;&#x6389;&#x7684;&#x8F93;&#x5165;&#xFF1B;</li>
<li><code>:disabled</code>&#xFF1A;&#x548C;<code>:enabled</code>&#x6B63;&#x597D;&#x76F8;&#x53CD;&#xFF0C;&#x9009;&#x62E9;&#x90A3;&#x4E9B;&#x4E0D;&#x80FD;&#x8F93;&#x5165;&#x7684;&#x3002;</li>
</ul>
<p>&#x6B64;&#x5916;&#xFF0C;jQuery&#x8FD8;&#x6709;&#x5F88;&#x591A;&#x6709;&#x7528;&#x7684;&#x9009;&#x62E9;&#x5668;&#xFF0C;&#x4F8B;&#x5982;&#xFF0C;&#x9009;&#x51FA;&#x53EF;&#x89C1;&#x7684;&#x6216;&#x9690;&#x85CF;&#x7684;&#x5143;&#x7D20;&#xFF1A;</p>
<pre><code class="lang-javascript">$(<span class="hljs-string">&apos;div:visible&apos;</span>); <span class="hljs-comment">// &#x6240;&#x6709;&#x53EF;&#x89C1;&#x7684;div</span>
$(<span class="hljs-string">&apos;div:hidden&apos;</span>); <span class="hljs-comment">// &#x6240;&#x6709;&#x9690;&#x85CF;&#x7684;div</span>
</code></pre>

                                
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